The Rule 33 Three-Year Window for Newly Discovered Evidence

Two Deadlines, and Why the Choice Between Them Is Decisive

Rule 33 contains two clocks, and the gap between them is enormous. A motion grounded on newly discovered evidence gets three years; a motion grounded on anything else gets fourteen days. Choosing the wrong track, or missing the short one, usually ends the claim.

The deadlines are set by Rule 33(b). Subsection (b)(1) allows a newly-discovered-evidence motion to be filed within three years after the verdict or finding of guilty. Subsection (b)(2) requires every other ground — trial error, an evidentiary ruling, prosecutorial overreach, or the weight of the evidence — to be filed within fourteen days. A crucial detail is the starting point: both clocks run from the verdict, not from the later sentencing hearing. A defendant who waits until sentencing to raise a trial-error argument has almost always already lost the fourteen-day window.

The structure rewards early, careful work. Because the fourteen-day window is so short and cannot be stretched at will, counsel routinely files a protective motion within fourteen days to preserve every non-evidentiary ground, then supplements the newly-discovered-evidence claim later within the three-year period as the facts develop.

What Actually Qualifies for the Three-Year Window

The three-year window is not a general escape hatch from the fourteen-day rule. It is available only when the motion is genuinely based on newly discovered evidence, and courts police that boundary to keep trial-error claims from smuggling themselves into the longer deadline.

The line matters because the two tracks are not interchangeable. A defendant cannot recast an argument about an erroneous jury instruction or an improper closing as newly discovered evidence merely to gain three years; those are quintessential fourteen-day grounds. Nor can a late motion revive an expired one. Under the consensus in the federal courts, an untimely motion cannot relate back to, amend, or renew a timely motion, so a defendant who filed within fourteen days on one theory cannot use a later filing to add fresh trial-error arguments under the broader interest-of-justice standard. Once the fourteen days pass, he is left only with the newly-discovered-evidence route and its stricter substantive test.

This makes characterization the first strategic decision. If the post-verdict development is truly evidence that surfaced after trial — a recanting witness, a suppressed document, proof that another person committed the offense — the three-year window is open, subject to the newly-discovered-evidence standard covered on the companion pages. If the complaint is instead about how the trial was conducted, the fourteen-day clock controls and cannot be extended by relabeling. Getting this classification right at the outset determines which deadline governs and whether the ground survives at all.

Claim-Processing, Not Jurisdictional: Eberhart

A defendant who files late is not automatically out of court. The Supreme Court has held that Rule 33’s deadlines are claim-processing rules rather than limits on the court’s jurisdiction, which means the government can lose the benefit of the deadline by sleeping on it.

The controlling decision is Eberhart v. United States. There, the defendant filed a timely new-trial motion and then, nearly six months later, added a new ground in a supplemental memorandum; the government did not object to the lateness until after the district court had ruled on the merits. The Court held that Rule 33 “is a claim-processing rule — one that is admittedly inflexible because of Rule 45(b)’s insistent demand for a definite end to proceedings,” but that such rules “assure relief to a party properly raising them” while they “do not compel the same result if the party forfeits them.” Because the government failed to raise untimeliness until after the merits were decided, it forfeited the defense.

Eberhart draws on the terminology the Court adopted in Kontrick v. Ryan, which explained that a claim-processing rule, “even if unalterable on a party’s application, can nonetheless be forfeited if the party asserting the rule waits too long to raise the point.” The practical consequence is real but limited: a late Rule 33 motion may still be decided on its merits if the prosecution does not timely object. A defendant should never count on that forfeiture — the safe course is always to file on time — but where a filing slipped, the timeliness defense is not jurisdictional and can be waived by the government’s silence.

But the Deadline Is Still Rigid: Carlisle and Rule 45(b)

Non-jurisdictional does not mean forgiving. When the government does invoke the deadline, courts enforce it strictly, and a judge has no free-floating power to excuse a late post-verdict motion. The rigidity comes from Rule 45(b).

The Supreme Court made the point emphatically in Carlisle v. United States. Addressing the parallel deadline for a judgment of acquittal, the Court held there is “simply no room in the text of Rules 29 and 45(b) for the granting of an untimely postverdict motion,” even one filed a single day late and even when accompanied by a claim of innocence. The Court also rejected the idea that a court’s inherent supervisory power could rescue an untimely motion, explaining that federal courts “have no more discretion to disregard the Rule’s mandate than they do to disregard constitutional or statutory provisions.” The same reasoning governs Rule 33, which is listed alongside Rule 29 in Rule 45(b)(2)’s bar on extensions.

Read together, Eberhart and Carlisle define the true shape of the deadline. It is not jurisdictional, so a court is not required to dismiss a late motion the government fails to challenge. But it is inflexible, so once timeliness is properly raised, the court cannot extend it, cannot invoke inherent power to hear it, and cannot treat an interest-of-justice claim filed after fourteen days as anything other than untimely. The distinction between jurisdictional and claim-processing rules, clarified in Kontrick, is the reason both propositions can be true at once.

Filing While an Appeal Is Pending: The Remand Procedure

Newly discovered evidence often surfaces after the defendant has already appealed. Rule 33(b)(1) lets the motion be filed during the appeal, but it limits what the district court can do, and the procedure has specific steps that must be followed to obtain relief.

The Fifth Circuit set out the mechanics in United States v. Redd. Although a district court may not grant a newly-discovered-evidence motion while an appeal is pending, it “does, nevertheless, have jurisdiction to entertain the motion and either deny the motion on its merits, or certify its intention to grant the motion to the Court of Appeals, which could then entertain a motion to remand the case.” Critically, Redd holds that the district court errs if, solely because the case is on direct appeal, it denies the motion for lack of jurisdiction. The court must actually consider it.

The older decision in United States v. Fuentes-Lozano describes the same path and the defendant’s options. The table summarizes them.

The one thing that cannot happen is an outright grant without a remand. Coordinating the trial court and the court of appeals is one more reason to involve counsel early and track both the Rule 33 deadline and the appellate schedule. This overview is general legal information, not legal advice about any specific case.

Where This Fits

This guide is one of four situations that arise under the Rule 33 Motion for New Trial. Start with the parent motion for the overall framework, or move to a related fact pattern:

What the Case Law Says

These decisions—verified against primary sources—control how this issue is litigated. Every case still turns on its own facts.

• Eberhart v. United States, 546 U.S. 12 (2005) — Rule 33 time limits are inflexible claim-processing rules, not jurisdictional; the government forfeits a timeliness defense not raised before the merits.
• Carlisle v. United States, 517 U.S. 416 (1996) — There is no room to grant an untimely post-verdict motion, even one day late, and inherent power cannot override Rule 45(b)'s bar on extensions.
• Kontrick v. Ryan, 540 U.S. 443 (2004) — A claim-processing rule, even if unalterable on application, can be forfeited when the party asserting it waits too long to raise the point.
• United States v. Redd, 355 F.3d 866 (5th Cir. 2003) — While an appeal is pending, a court may deny a new-trial motion or certify intent to grant it, and errs by denying solely for lack of jurisdiction.
• United States v. Fuentes-Lozano, 580 F.2d 724 (5th Cir. 1978) — A district court may not grant a new-trial motion after an appeal is taken except on remand; it may deny it or certify intent to grant.

General summaries of published opinions for information only — not predictions about any specific case.